Bump BenchmarkDotNet and BenchmarkDotNet.Diagnostics.Windows

Bumps BenchmarkDotNet from 0.15.2 to 0.15.4
Bumps BenchmarkDotNet.Diagnostics.Windows from 0.15.2 to 0.15.4

---
updated-dependencies:
- dependency-name: BenchmarkDotNet
  dependency-version: 0.15.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: BenchmarkDotNet.Diagnostics.Windows
  dependency-version: 0.15.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

LLama.Benchmark/LLama.Benchmark.csproj

@@ -10,8 +10,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.15.2" />
-    <PackageReference Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.15.2" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.15.4" />
+    <PackageReference Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.15.4" />
   </ItemGroup>
 
     <ItemGroup>